The first symlink is not a typo, it is deliberate. After much trial and error (and ethereal packet sniffing) I discovered that for some reason the requested file kept dropping the trailing zero and so by simply adding the symlink everything worked.

With all this in place I was able to power-on the ALIX.2D3, watch it configure via DHCP and then retrieve and execute the installer.

Please leave a comment if you’ve found any of this useful, that way I won’t feel like I’ve wasted my time writing all this up 🙂